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Dwell time of percutaneous nephrostomies in pregnancy - what is the optimal exchange interval? [PDF]
BMC UrolKhanna Y +4 more
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Standardized angiographic workflow and technique for genicular artery embolization. [PDF]
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On calculating kerma, collision kerma and radiative yields
Medical Physics, 2019PurposeTo study the relationships between dose (D), kerma (K), and collision kerma () in photon beams and to investigate total radiative yields for electrons and positrons as a function of energy. To do this accurately required calculating collision kerma directly as a function of position in a phantom and making changes to the EGSnrc package ...
D W O Rogers
exaly +3 more sources
Kerma-Area Product in Diagnostic Radiology
American Journal of Roentgenology, 2014W565 is traveling through air, and it is how the intensity (strength) of the x-ray beam is characterized [6]. Air kerma can be thought of as the number of individual x-ray photons per unit area, which therefore says nothing about the extent (area) of the x-ray beam. Although xray photon energies play a role in determining air kerma, this is a secondary
Walter Huda
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Air kerma rate constants for radionuclides
European Journal of Nuclear Medicine and Molecular Imaging, 1988Conversion to SI units requires that the exposure rate constant which was usually quoted in R.h-1.mCi-1.cm2 be replaced by the air kerma rate constant with units m2.Gy.Bq-1.s-1. The conversion factor is derived and air kerma rate constants for 30 radionuclides used in nuclear medicine and brachytherapy are listed.
Herman Wasserman, Wasserman Herman
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Archaeology of the Kerma Culture
2021Abstract Kerma was a Bronze Age culture (c. 2500–1500 bce) located in what is today Sudan and southern Egypt. It is one of the earliest complex societies in Africa and, at its height, rivaled Ancient Egypt. The ancient Kerma culture spans the Pre-Kerma, examining the settlements and cemeteries of this ancient culture during the Pre ...
Sarah Schrader, Stuart Tyson Smith
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A new Diamentor for measuring kerma‐area product and air‐kerma simultaneously
Medical Physics, 1997The new M4KDK Diamentor (PTW‐Freiburg) for measuring the air‐kerma‐area product (KAP) and air kerma (AK) simultaneously was evaluated. The special design of the Diamentor chamber influences the variation of the calibration factor with respect to the field size somewhat differently to what is the case with the classic Diamentor.
H, Gfirtner, F E, Stieve, J, Wild
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The Pre-Kerma Culture and the Beginning of the Kerma Kingdom
2021Abstract The Pre-Kerma is an Upper Nubian culture that developed between 3500 and 2500 bce. It preceded the Kerma civilization and was in part contemporaneous with the A-Group from Lower Nubia. It consisted of an agro-pastoral population that maintained contacts with Lower Nubia and produced pottery somewhat similar to that of the A ...
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